using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        DateTime x =DateTime.Parse("9/1/2019 12:30:18 PM");

        var zone = TimeZoneInfo.FindSystemTimeZoneById("UTC");

        DateTime dateTime1 = DateTime.SpecifyKind(x, DateTimeKind.Utc);

        DateTime pst = TimeZoneInfo.ConvertTimeFromUtc(dateTime1, zone);

        string test="-7:00";

        Console.WriteLine(test);

        Console.WriteLine(test.Substring(0,1));

        Console.WriteLine(test.Substring(1,1));

        Console.WriteLine(test.Substring(3,2));

        string Operator= test.Substring(0,1);

        int Hour=Convert.ToInt32(test.Substring(1,1));

        int Minutes=Convert.ToInt32(test.Substring(3,2));

        if (Operator=="+") {

            pst=pst.AddHours(Hour).AddMinutes(Minutes);

         } else if (Operator=="-"){

            pst=pst.AddHours((-1*Hour)).AddMinutes((-1*Minutes));

        }

         Console.WriteLine(pst);

        //test1 Datetime=DateTime.Parse("2019-01-")

​

    }

}